“Mental toughness is an essential part of performing at the highest level. No matter how talented you are, if you don’t have mental toughness, you will have serious problems. Whether you are a footballer, a golfer or a swimmer.
I have said it before, you play football with your head. You can be technically and tactically gifted and skilled, but if things in your head are not right, you are going to have a problem.”
Johan Cruyff, April 2015